_STACK SEGMENT STACK            ;8088宏汇编程序
    DW   64 DUP (?)             ;定义堆栈段
_STACK ENDS 
CODE    SEGMENT                 ;定义代码段
ASSUME CS:CODE,SS:_STACK

START:  MOV  CX,001AH
        MOV  BL,41H
        MOV  AH,02H
A1:     MOV  DL,BL
        INT  21H
        INC  BL
        PUSH CX
        MOV  CX,0FFFFH
A2:     LOOP A2
        POP  CX
        DEC  CX
        JNZ  A1
        JMP  $

CODE   ENDS
    END     START